Watlow Electric Manufacturing Company

Phillip S Schmidt

Mark Denis Everly

Jeremy Ohse

Cal Thomas Swanson

John Frederic Lemke

Patrick Margavio

Brittany Phillips

Jake Spooler

Paul Valachovic

Melissa Lanham

A heater includes at least one resistive element. The at least one resistive element includes a material having a high temperature coefficient of resistance (TCR) such that the resistive element functions as a heater and as a temperature sensor, the resistive element being a material selected from the group consisting of greater than about 95% nickel, a nickel copper alloy, stainless steel, a molybdenum-nickel alloy, niobium, a nickel-iron alloy, tantalum, zirconium, tungsten, molybdenum, Nisil, and titanium. In one form, the heater is a tubular heater with compacted MgO insulation and a metal sheath.

Electric heaters with low drift resistance feedback

A thermal array system is provided. The system includes a first thermal element and a second thermal element connected between a first node and a second node. The first thermal element being activated and the second thermal element being deactivated by a first polarity of the first node relative to the second node. Further, the first thermal element being deactivated and the second thermal element being activated by a second polarity of the first node relative to the second node.

Thermal array system

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Winona, MN, United States of America

Phillip S Schmidt